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Sensors 2017, 17(10), 2205; https://doi.org/10.3390/s17102205

Study of GNSS Loss of Lock Characteristics under Ionosphere Scintillation with GNSS Data at Weipa (Australia) During Solar Maximum Phase

1
School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China
2
Abdus Salam International Centre for Theoretical Physics, Telecommunications/ICT for Development Laboratory, Trieste 34151, Italy
3
Collaborative Innovation Center of Geospatial Technology, Wuhan 430000, China
4
School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
*
Author to whom correspondence should be addressed.
Received: 22 July 2017 / Revised: 19 September 2017 / Accepted: 20 September 2017 / Published: 25 September 2017
(This article belongs to the Section Remote Sensors)
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Abstract

One of the adverse impacts of scintillation on GNSS signals is the loss of lock status, which can lead to GNSS geometry and visibility reductions that compromise the accuracy and integrity of navigation performance. In this paper the loss of lock based on ionosphere scintillation in this solar maximum phase has been well investigated with respect to both temporal and spatial behaviors, based on GNSS observatory data collected at Weipa (Australia; geographic: 12.45° S, 130.95° E; geomagnetic: 21.79° S, 214.41° E) from 2011 to 2015. Experiments demonstrate that the percentage of occurrence of loss of lock events under ionosphere scintillation is closely related with solar activity and seasonal shifts. Loss of lock behaviors under ionosphere scintillation related to elevation and azimuth angles are statistically analyzed, with some distinct characteristics found. The influences of daytime scintillation and geomagnetic storms on loss of lock have also been discussed in details. The proposed work is valuable for a deeper understanding of theoretical mechanisms of—loss of lock under ionosphere scintillation in global regions, and provides a reference for GNSS applications in certain regions at Australian low latitudes. View Full-Text
Keywords: ionosphere scintillation; loss of lock; temporal and spatial characteristics; GNSS signals; solar maximum ionosphere scintillation; loss of lock; temporal and spatial characteristics; GNSS signals; solar maximum
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Liu, Y.; Fu, L.; Wang, J.; Zhang, C. Study of GNSS Loss of Lock Characteristics under Ionosphere Scintillation with GNSS Data at Weipa (Australia) During Solar Maximum Phase. Sensors 2017, 17, 2205.

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